instrumentation to see accumulated objects

output: https://gist.github.com/wiredfool/5754556

from IRC:
```
(09:33:00 PM) wiredfool: couple of things for you
(09:34:26 PM) wiredfool: http://www.insweat.com/whispers/articles/python-gc -- see para 2. gc.DEBUG_LEAK looks like a memory leak itself, esp to tools like top
(09:36:40 PM) crundar [636ce13a@gateway/web/freenode/ip.99.108.225.58] entered the room.
(09:36:42 PM) wiredfool: second, there's definitely some retained objects in the boto uploads to s3 https://gist.github.com/wiredfool/5754498
```